Some lights flicker. Turning it on may help in those cases. From the manual:
Flicker Reduction
You can perform the following procedure to have the camcorder
automatically detect and reduce flicker.
1 Open the [Flicker Reduction] submenu.
[~ Camera Setup] > [Flicker Reduction]
2 Select [Automatic] and then press SET.
NOTES
• When recording under artificial light sources such as fluorescent, mercury or halogen lamps, the screen may
flicker depending on the shutter speed. You may be able to avoid flicker by setting the shutter mode to
[Speed] and the shutter speed to a value matching the frequency of the local electrical system: 1/50* or 1/100
for 50 Hz systems, 1/60 or 1/120 for 60 Hz systems.
* May not be available depending on the frame rate.
